Transcript
Cachet Fine Art Photographic Papers MACOPHOT
Technical Data Sheet b&w films (see also www.oneachet.com)
Cachet has a line up of excellent b&w films for the serious amateur and professional photographer: general purpose 100 and 400 ASA, two orthochromatic films and an Infrared film.
MACOPHOTO ORT 25 Orthochromatic film and PO 100 medium contrast orthochromatic film. 1. Emulsion. Thincoat (7 microns without base) document emulsion, traditional crystal technology, high contrast working. 2. ISO Values. Since an industry standard for determining speed of orthochromatic film has not defined, no definitive information about a standard value can be given. As a starting point for ORT25, begin with an exposure setting of ISO 50/18° based on incident light measurement, light meter pointed from object to camera. Make individual test for determining optimum exposure. 3. Granularity and Resolving Power. For both ORT 25 and PO100, the following: RMS (x1000): 6.0. Contrast 1000:1 350 lines/mm. 4. Processing Instructions. Following times are based on 20° C, agitation, 5 secs. every 30 secs.
Step
Time in Minutes
Developer
ORT 25
PO100 Clear
Kodak Docufine
6
6
Agfa
4
4
4
4
Rodinal (1:10) dilution Tetanal Ultrafin Plus
5. Application Information. ORT25 is a high contrast film, excellent for copy work and forensic photography. PO100 is a lower contrast film that has applications in many scientific fields such as astrophysics and medical photography. For portrait and studio work use an orange filter. Because of their high resolution, these films produce extremely sharp, grainless negatives.
6. Both ORT25 and PO-100 are available in 135, 120, and 4x5 sizes. Special sizes like 8x10 on request.
MACOPHOT IR 820c Infrared film 1. Description. An infrared emulsion with a spectral sensitivity of 820 nm coated on a very stable clear polyester base treated with a special anti-halide backing. This backing minimizes the halo effect, gives the film an extremely low fog level (approximately 0.07 DD), and minimizes reflective interference within the camera. The clear base allows for easier focusing when printing. Also, when the film is reversed for slides, the clear base assures brilliant projection. 2. Notes on handling. Load and unload your camera in complete darkness, either in a darkroom or use a changing bag. 3. Notes on focusing. Especially with filters that block out most or all of the visible light, a focus adjustment is necessary. Most lenses have and IR index. For those that don’t extend the focus 1/100 of the focal length. 4. Processing. Use a stainless tank for processing infrared film. If you use a plastic tank, wrap it in aluminum foil. Develop in complete darkness. The anti halation coating is water-soluble. A one-minute pre wash before development will take out this coating. The wash water will turn green. 5. Processing Data. All given times are guidelines and are based on 21°C/71°F. Agitation for the first 30 seconds and then for 5 seconds every 30 seconds will produce the best possible acutance.
Product
Dilution
Time in minutes
MACO LP Docufine LC
1:4
7
Kodak d-76
ID 11 stock
13
Kodak XTOL
1:3
14
6. Film speed. Without a filter the MACO IR 820c film should be exposed with a setting of ISO 200/24° to ISO 400/27° depending on image contrast and developer.
7. Size Assortment. Available in 135 mm, 120 and 4X5 sizes. 8. Filters. Without filters MACO IR 820c film will record the visible light spectrum. With filters like the Kodak 89bB and Heliopan 715 produces strikingly different images Following is a list of filters and their absorption values.
Filter
Absorption
Wratten #25
600 nm
Wratten #29
620 nm
Wratten #70
680 nm
Wratten #89B
720 nm
Wratten #88A
750 nm
Wratten #87
800 nm
Wratten #87C
850 nm
Wratten #87B
940nm
Cachet Fine Art Photographic Papers
Technical Data Sheet
General Purpose Films MACOPHOT UP 100 and 400 1. Emulsion. The emulsion is a traditional silver crystal technology with a pancromatic sensitivity, 2. ISO Values. The UP 100 film speed is ISO 100. The UP 400 ISO is 400 3. Processing Instructions. Following times are based on 20° C, agitation, 5 secs. every 30 secs.
Developer
UP 100 time in minutes
UP 400 time in minutes
Kodak D-76
8
1
Cachet AB55
5
5
Tetanal Ultrafin Plus
7
9
Stop Bath
1
1
2 to 4
2 to 4
Fix Washing
5
6. Safelight Requirements. Process in complete darkness. If some illumination is required use deep pancromatic filter set at least 48" form the film. 8. Size Assortment. Available in 135 mm and 127 sizes. 9. Storage. MACOPHOT films should be stored in a cool dry place. If you freeze your film, allow at least two hours for it to come back to ambient temperature. .
Cachet Fine Art Photographic Paper Company 3701 West Moore Ave Santa Ana CA 92704 714 432 7070 x620 fax 432 7102 E-Mail
[email protected]
Cachet Fine Art Photographic Papers The Toners
Technical Data
Sheet Selenium, Sepia, & Azur Blue (see also www.oneachet.com)
Cachet toners are special, high quality toners suited producing fine art prints of the highest quality. The LP Selenia (I) is the highest grade of selenium available. The LP Sepia (II) is an odorless, bleach and redevelop toner. And the LP Azur Blue (III) is easy-touse immersion toner.
I. Selenium Toner 1. MACO LP Selenia is a modern selenium toner used in processing black and white prints to improve archivality by turning the silver into silver selenite, a compound that is more impervious to environmental pollutants. Selenium toning, done according to the instructions, also increases maximum density and cleans up the whites. The chart below shows the time/toning results ratio.
With pure bromide papers, at normal dilution there is an increase in d-max but almost no change in image tone. Changes in image tone in bromide prints are possible by toning them for about 10-12 minutes in a dilution of 1:1 or 1:3. The result is a metallic shine like that of platinum print. With chlorobromide papers such as Cachet expo RF or any of the Cachet VC papers, there is a distinct shift in image color ranging from a reddish black to an eggplant purple.
Outcome
Suggested dilution
1.Improve archivality
Mix LP Selenia 1:19 parts water. Tone for 2-3 minutes 24° C/75° F.
2.Increase d-max
Mix LP Selenia 1:19 parts water. Tone for 2-5 minutes 24° C/75° F.
3.Manipulate Image Tone
Mix LP Selenia 1:3 parts water. Tone for 4-10 minutes 24° C/75° F OR
Alternative to #3
Mix LP Selenia 1:9 parts water. Tone for 6-15 minutes 24° C/75° F.
Always tone at a temperature higher than the final wash water. Do not use a fixer with hardener when toning. Follow normal washing procedures for RC or fiber prints
.2. Safety Notes. MACO LP Selenia contains Ammoniumthiosulphate up to 30%, Natriumsulphate up to 10% and Natriumselenite up to 3%. For safe use of this product please follow these instructions:
a. a. b. c. d.
Avoid direct contact with skin. Wear rubber or latex gloves. Make sure that the room where the toning take places is sufficiently ventilated. Follow all mixing instructions closely. Trays, tongs, and mixing jugs should be kept separately only for toning with LP-SELENIA. II. MACO LP SEPIA
1. Product description. Maco LP Sepia is a brown toner for use with processed black and white prints fiber as well as RC. Besides changing the color of the print, this toner will improve archivality by turning the silver into silver sulfide, a compound that is more impervious to environmental pollutants. 2. Application instructions. Due to its two-bath design, LP-Sepia gives off almost no odor and very few harmful vapors when working according to instructions.
a. a. b.
Bath A (Bleach) will convert, metallic image silver into a colorless silversalt. Time in Bath A will determine image tone: Shorter bleach time more of a black/brown image tone; longer bleach time will result in a browner tone.
c. d. 3. Mixing.
Bath B (toner) converts image silver into a very stable silver sulfide compound, which accounts for the brown tone.
Toning Variable Contrast Paperion is 1:5, 1 : 7 parts water Immersion time Bath A
10:60 seconds
Washing at 20° &° )
5-10 minutes
Bleach must be washed out completely Immersion in Bath B toner
60 seconds
Toning Graded PapersDilution 1:7, 1:9 Immersion time Bath A
10:60 seconds
Washing at 20° &° )
5-10 minutes
Bleach must be washed out completely Immersion in Bath B toner
60 seconds
Different papers tone differently. Start with well washed spare prints. Use fix without hardener when toning.
4. LP Sepia Toner is available in kits 2x250cc to make 2.5 liters of working solution and in 1x1liter kits to make 10 liters.
III LP Azur Blue Immersion Toner 1. Product Description. LP Azur BlueToner is a one-bath, two-part blue immersion toner for use with black and white films and films. This toning does not need a darkroom and can be performed under normal lighting. This toner works by causing metal salts to accumulate metallic image silver in proportion to the density of the image. 2. Mixing Instructions. Dilute one part of A and one part of B with eight parts of water. Dry as well as wet photos can be toned. Immersion time one to three minutes, depending on the desired degree of toning. 3. Application Instructions. LP Azur BlueToner is an immersion toner. In daylight, mix in a tray according to instructions (1:1:8) and place prints in the toner emulsion side up. Agitate mildly. The duration of immersion relates directly to the intensity of the blue tone. For best results use under exposed negatives and prints since the blue toner will increase density. Toning expo AG produces particularly stunning results. LP Azur BlueToner will not give harmful and annoying vapors when used according to instructions. 4. Producing black and white slides. Use MACO ORT 25 and expose your text or graphics in such a way that the white background will show a medium density. Process film as slide. Immerse in a standard solution (1:1:8) until the desired intensity of the blue tones. 5. MACO LP Azur Blue Toner is available in kits 2x250cc liquid to make 2.5 liters of working solution and in 2x1 liter to make up to 10 liters of working solution. 6. Safety Instructions. For your own safety, please follow the instructions: - Avoid direct contact with skin. Use tongs for handling photos. - Do not mix any other substances into LP-AZUR. - Keep photographic chemistry out of the reach of children. - If contact with skin or eyes occurs wash with plenty of water. - If accidentally swallowed, induce vomiting. Seek medical assistance
Cachet Fine Art Photographic Paper Company 3701 West Moore Ave Santa Ana CA 92704 714 432 7070 x620 fax 432 7102 E-Mail
[email protected]
